@PhAndersson said:
Could it somehow be related to the fact that the clock is now reasonably synched?
I don't think so, for the following reasons:
I did give you the hint about recreating the connection, and I don't have a mediatek device
date problems for ssl come from the securing through a certificate infrastructure, that don't make much sense for Bluetooth, whose hacking radius is 10 meters vs 40000 km for standard internet networking
updating certificates and certificates lists would be unfeasible for many Bluetooth devices that don't even have an Internet link
This said, if you want to try it out, it's easy: just re-enable the qualcomm time service and check again.